Tire-making machine



Jan. 3, 1928.

1,654,845 w. c. STEVENS TIRE MAKINQ MACHlNE Filed Mareh'y, 1921 2Sheets-Sheet 1 weaaf V fizzy/cm? Jan. 3, 1928.

1,654,845 w. c. STEVENS TIRE MAKING MACHINE Fil ed March '2, 1921 2Sheets-Sheet 2 hfwafazzv". 54/ fife ueraa;

Patented Jan. 3, 1928.

WILLIAM ous'rnvnns, .OFiAKR-DNT, OHIO, assrenon T rnnnmns'ronn'rmnan]; i

RUBBER COMPANY, ,OF AIKBQN, 01-110, A CORPORATION. 1013.10.

TIREIMAZKING mcmm A pplieat-ion filed Mar-011 11921. Serial-No.*450;387.

The invention relatesv-to' machines .iEor the manufacture oitirecasings, and is specifi- 1 'call y directed to -the trimmingmechanism to be used in conjunction with the remaining 5 elements of the:tiremachine. (It is designed so that the trimming mechanism may be usedin connection-With a shiftable or bodily movable core, withoutendangering the tIlIIlmin-g device. The invention is specificallydirectedto be u'se'dfiandto:co-ordinate .With a machine of the typeshown in my prior co-pending application Serial No.-256, l29, Pat. No.1,557,891,: Oct. 20,1925, filed Octob 1 51-918, although its usefulness.is not limited to the exact machin-eshown in'the said application, butmay be broadened to use-inother machines.

The 'machine' reierred to as embodied in the said-application; comprisesa plurality of tire snaking cores and "supports, which are adapted to bemoved about in a machine, vso the building of :tlie tire may take 'placeat a plurality of points prpositrons. At one oft he' positions, trimmingknives are used in conjunctionwith-the core to trim the. completedcarcass which has been partially or wholly madeiatzthe other corepositions; A turntable or movable carriage {is provided'avhich; supportsthe ;c.ores. 'andunoves them from; one-position: to. another, themechanism rfor moving: the :turntable :being rioperable from one of thepositions, usually from a i the zztrinrming; and inspecting: positions.s

,ltih-as :beeufoundtthat in the efforts of the UPEIfltOI JtO idorthetrimming coperati'on 116K- perlitionsly, there a -has been 1 a tendency"to move rthe j knives into v.it rimming 'fPDSltlOIl be fore-i the core.is, :at 1. rest,rand asthegtrimming knives 1pass' Within "the outerperiphery ;of

4o theicore ingoinginto ttrimming position,

theprematurepperation of the knives will result in breakage of'theknives by 'the core I, as it is moving-across the path of .traveldt'thd knives. To prevent these accidents, meansareprovidedsas contemplatedin this invention, which will prevent ;the;:advance of'ithe knives:until theicore comes toa position of :rest oppositeithetrimminglknives.

Thezparticular 'form of locking means and the x-form ofxtheitire machine:are not essential, and vboth .mayfrbe variedbwithout departingitrom theinvention :or sacrificing any of itsbenefifts. Onlyisuchnparts.of theinathereto.

. mechanism.

erals 7, driven ,Vbysany-esuitable ideviceiand to this-invention.

necessary to describe it in detail here, a

full description being .;-given in my'prior applicationreferred toabove."Forthe' purknives '11, at their fiorward endsp the :arms

chine-ere shovvnand describedasare neces- I sary for anunderstandmgot'theinventlon. 155

Fig. 1 is a plan view of thegti-rebuilding' machine having this 1invention applied. 7

Fig. 2 is an elevation of-thettrimming Fig; .3 is an enlargedfragmentary-Mew looking down on the lockingdevice.

' The machine comprises a base :lzon vvhich" is supported,.in anysuitableemanner, aamovable or shiftable turntable 2 whichicarries fltrimmed and inspected. 'iThe turntable is ar'rangedto hemovedzby anysuitable,- means, here jSlIOWI1.&S:JL-ii;illtlmittently I actuated gearor Wheel-h which :,en-. gages With; a zseriesgo-t pins a6 to 5 drive theturntable vthrough :a 5 quarter got ea. revelution to advance the cores-to {their nextzzpoitions. The cores are rotatedwin-ieachposition by Vclutch ;mechanisms indicated :;by :thearnmnconnected and disconnected inthe manner more vfully described in ,the :application abovereferredato,gbut wvhichfhasfnorelation V Opposite the Djposition of the,core 1 and secured to thejundersidevof a centrally lo-' catedtable Z8 isa-cutt'er mechanism which is. housed-in a box *or "framework 9.. Theinternal mechanism for operating ithencuttzers 7. may be of anypreferred form and pitais @not poses ofthe present invention itissuihcient to state that the trimming mechanism com prises twosWingingTarms- 10, carrying being advanced outwardly while expanded topositions on the sides of the core, and then swung inwardly to trim thecarcass at the beads.

The advancing of the knives fromtheir position of retreat to a positionat the sides of the core and their subsequent inward rocking to trim isperformed by a single hand lever 12 which projects upwardly above thetable, the lower end of the lever being secured to the face of a gear13, which is connected by a train of gearing 1a to the knife carryingarms. The lever is arranged so asto be pulled downwardly, whereupon theknives are actuated in the manner described.

To the face of the gear 13, by a pivot 15 is secured an adjustable link16 which extends downwardly as shown in Fig.v 2,.

and is pivotally connected at 17 to a rocking sector or latch 18. Thesector 18 is rotatably mounted at a central point on a pin 19, which iscarried on a standard 20 rising from the base 1. The end of the sectoropposite the point 17 normally lies just below the inner edge of theshiftable core carrying support or turntable 2.

In the inner edge of the turntable are formed a plurality .of notches21, one for each core in the turntable, the position of the notchesbeing such that when the turntable has come to rest with the core in I)position directly opposite the trimming knives, the sector will registerwith the proper notch. The upper edge of the sector or latch ispreferably tapered as at 22 so that it will easily enter the notch 21. VThe operation of the mechanism shown will be readily understood. Whenthe turntable has been shifted to move each core to its next position,the core in D position carries a carcass which is completed except forthe trimming. The operator then pulls down the hand lever 12, which,through appropriate connections advances the knives to trimmingposition. It will be seen that until the turntable is in proper positionthe knives cannot be brought outwardly from their position under thetable 8, as the sector cannot be rocked until its extension is inregister with a notch 21. In this manner premature operation of theknives is prevented and danger of bending or breaking the knife carryingarms is obviated as there is no possibility of the knives being movedoutwardly into the path of a moving core.

It is obvious that other means and devices may be used for accomplishingthe purposes of the. present invention, but it will be understood, that,as far as known to me, I am the originator of a device in which ashiftable core is used with a trimming device in combination with meansfor preventing operation of the trimming denumber of core supports, saidmember being movable into each of said recesses.

2. In a tire making machine, the combination of a turntable, a pluralityof core supports on vthe turntable, a knife mova-' ble over the core, arocking sector mounted adjacent the turntable, said turntable beingprovided with a number of recesses equal in number to the core supports,and means connected With the knife to rock the sector to cause it topass into each recess asits core is located in line with the knife. 3.In a tire making machine, the combina-. tion of a turntable, a pluralityofcore supports on the turntable, a knife, anarm carrying said knifemovable to and from the core, a latch connected to said knifev and1anumber, of recesses in the turntable equal to the number of coresupports, each of said recesses bev ing adapted to; receive the latchwhen a core is in line with the knife carrying arm,

at. In a tire making machine, a core support, means for shifting saidcore, a trimming mechanism for trimming the tire on, the core, saidmechanism being manually movable from a position outside of the periphery of the core to the trimming point on the core, and means toprevent movement of the trimming mechanism except when the, core is inproper position, said means being adapted then to permit manual movementof; said mechanism- 5. In tire making machine, a core, means forsupporting the core, saidv supporting means being shifatble to move thecore into and out of trimming position, mechanism for trimming the tireon the core including a knife carrying arm manually movable from aposition of retreat to trimming. po sition, and means'for preventing themovement of saidarm from retreatunless thetion of a movable core supportfor moving a core into and out of trimming position, a knife manuallymovable radially of the core, a latch connected to said knife, and meanson said support for releasing the latch, said releasingmeans operatingto free said latch to permit manual movement of the knife only when saidcore is in trimming position. r

8, In a tire making machine, the combination of a turntable, a pluralityof core supports on the turntable, a knife manually movable over thecore, a movable member connected to said knife, said turntable beingprovided with a number of recesses equal to the number of core supports,said member belng movable into each of said recesses to permit manualmovement of said knife.

9. In a tire making machine, the combination of a turntable, a pluralityofcore supports on the turntable, a knife manually movable over thecore, a rocking sector mounted adjacent the turntable, said turntablebeing provided with'a number of recesses equal in number to the coresupports,

and means connected with the knife whereby v manual movement thereof mayrock the sec- 7 I tor to cause it to pass lnto each recess as its v coreis located in line with the knife.

10. In a tire making machine,the c o mbi- V a nation of a movable table,acore support on the table, a knife, an'arm manually movable to and fromthe core carryingsaid knife and a latch holding said arm away from thesupports on the turntable, a knife, an arm carrying said knife manuallymovable to and from the core, a latch connected to said knife and anumber of recesses in theiturntable equal to the number of coresupports,

each of said recesses being adaptedto receive the latch when a core isin line with the knlfe carrylng'arm to permit manual Jmovement of saidarm and to look the core during manual operation of the knife.

WILLIAM C. STEVENS,

manual movement I

